linux-kernel - [PATCH v1 2/3] clk: qcom: rcg2: Add support for hardware control mode

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Message-Id: <1557339895-21952-3-git-send-email-tdas@codeaurora.org>
Date:   Wed,  8 May 2019 23:54:54 +0530
From:   Taniya Das <tdas@...eaurora.org>
To:     Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>
Cc:     Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Taniya Das <tdas@...eaurora.org>
Subject: [PATCH v1 2/3] clk: qcom: rcg2: Add support for hardware control mode

Add a flag to indicate to support and enable hardware control mode
of an RCG.

Signed-off-by: Taniya Das <tdas@...eaurora.org>
---
 drivers/clk/qcom/clk-rcg.h  | 3 +++
 drivers/clk/qcom/clk-rcg2.c | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/clk/qcom/clk-rcg.h b/drivers/clk/qcom/clk-rcg.h
index c25b57c..5562f38 100644
--- a/drivers/clk/qcom/clk-rcg.h
+++ b/drivers/clk/qcom/clk-rcg.h
@@ -139,6 +139,7 @@ struct clk_dyn_rcg {
  * @freq_tbl: frequency table
  * @clkr: regmap clock handle
  * @cfg_off: defines the cfg register offset from the CMD_RCGR + CFG_REG
+ * @flags: additional flag parameters for the RCG
  */
 struct clk_rcg2 {
 	u32			cmd_rcgr;
@@ -149,6 +150,8 @@ struct clk_rcg2 {
 	const struct freq_tbl	*freq_tbl;
 	struct clk_regmap	clkr;
 	u8			cfg_off;
+	u8			flags;
+#define HW_CLK_CTRL_MODE	BIT(0)
 };

 #define to_clk_rcg2(_hw) container_of(to_clk_regmap(_hw), struct clk_rcg2, clkr)
diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c
index 57dbac9..5bb6d45 100644
--- a/drivers/clk/qcom/clk-rcg2.c
+++ b/drivers/clk/qcom/clk-rcg2.c
@@ -289,6 +289,9 @@ static int __clk_rcg2_configure(struct clk_rcg2 *rcg, const struct freq_tbl *f)
 	cfg |= rcg->parent_map[index].cfg << CFG_SRC_SEL_SHIFT;
 	if (rcg->mnd_width && f->n && (f->m != f->n))
 		cfg |= CFG_MODE_DUAL_EDGE;
+	if (rcg->flags & HW_CLK_CTRL_MODE)
+		cfg |= CFG_HW_CLK_CTRL_MASK;
+
 	return regmap_update_bits(rcg->clkr.regmap, RCG_CFG_OFFSET(rcg),
 					mask, cfg);
 }
--
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